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UNIT CHECKS
OVERDRIVE RELAY CHECK:
Disconnect plug at relay and Install test harness to
overdrive relay, but do not connect test harness to overdrive
harness plug. A jumper wire must be connected between
No. 3 pin and negative terminal of battery at all times
during check 1. Connect test lamp successively between a
ground and Nos. 1 and 4 contact pins. The test lamp should
not light on either of these checks. Connect No. 1 to No. 3
(pin) and a test lamp between No. 4 and a ground. Relay
should click and test lamp should light when No. 2 pin is
grounded.
FIGURE 30
If relay clicks and test lamp does not light, check fuse and
fuse holder.
SOLENOID CHECK:
A. CLOSING COIL - Remove solenoid from transmis-
sion, connect a jumper wire between positive t e r m i n
al of battery and mounting flange of solenoid. Connect
a second jumper wire between the battery negative ter-
minal and solenoid terminal No. 4; this should cause
the solenoid pawl rod to move out. If solenoid chatters
in Check A, Hold-In Coil is defective.
B. ENGAGING SPRING - With jumper wire still con-
nected as in paragraph "A", (solenoid energized, plunger
extended) place ball end of solenoid against bench. Push
down on solenoid. The pawl rod should move in 3/8"
under a load of not less than 8 lbs. nor more than 12.
Pawl should move out to extended position when load
is removed.
C. IGNITION GROUNDING CONTACT - Place a test
lamp between negative battery terminal and solenoid
terminal No. 6. Lamp should light when this connection
is made. Remove jumper from between negative battery
terminal and solenoid terminal No. 4. Pawl rod should
snap "in" and test lamp should go out.
FIGURE 31
GOVERNOR CHECK:
Remove overdrive wire at governor and connect test lamp
between governor overdrive terminal and negative terminal
of battery Figure 31. Drive car on road or raise on jacks. The
lamp should light at a car speed of between 18.5 to 21 M.P.H.
Upon decreasing speed, the lamp should go out at between
18.5 and 16 M.P.H. Differential between light "on" and light
"off" should be 2 or 3 M.P.H. car speed.
FIGURE 32
OVERDRIVE 9 - 23
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